The region is once again being hit by a heat wave which, according to Environment Canada, could last until Saturday.

Temperatures are expected to hover between 30 and 31 degrees Celsius, with humidex values of up to 40 degrees Celsius. Nights won't be much more comfortable, with the mercury not expected to drop below 18 degrees Celsius.

“Despite a brief lull on Wednesday thanks to showers, the heat will return on Thursday with a humidex approaching 40. Heat and humidity are likely to continue into Saturday,” said Environment Canada in a weather alert.

Countering the effects of heat

In very hot weather, a person's state of health can deteriorate rapidly. The Ministère de la Santé et des Services sociaux du Québec, in collaboration with Environment and Climate Change Canada, recommends protecting yourself from the effects of the heat by taking the following measures:

- Drink 6 to 8 glasses of water a day, without waiting until you're thirsty;

- If necessary, follow your doctor's instructions on how much fluid to drink;- Avoid drinking alcoholic beverages.

-Avoid alcoholic beverages and caffeine;

- If possible, spend at least 2 hours a day in an air-conditioned or cool place;

- Take at least one cool shower or bath a day, or cool your skin several times a day with a wet towel;

- Reduce physical exertion;

- Wear light clothing.

Make sure you :

- Never leave a child or baby alone in a car or poorly ventilated room, even for a few minutes;

- Check on and be ready to help loved ones, especially those who have lost their independence, have a disability, are mentally ill or live alone;

- Remember that the heat is uncomfortable for pets too.

For questions about a medical condition, call Info-Santé 8-1-1 or ask a healthcare professional. In an emergency, call 9-1-1.

Extreme heat can affect anyone's health. Health risks are greatest for the elderly, infants and young children, pregnant people, people suffering from physical or mental illness, and those with disabilities or mobility problems.

It is also advisable to monitor the effects of heat-related illnesses: swelling, rashes, cramps, fainting, heat exhaustion, heat stroke and the aggravation of certain health problems.

For more information, visit the Quebec government's Health and Wellness Portal at www.sante.gouv.qc.ca.